Distcp is very slow
-------------------

                 Key: MAPREDUCE-1231
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1231
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: distcp
    Affects Versions: 0.20.1
            Reporter: Jothi Padmanabhan
            Assignee: Jothi Padmanabhan
             Fix For: 0.20.2


Currently distcp does a checksums check in addition to file length check to 
decide if a remote file has to be copied. If the number of files is high 
(thousands), this checksum check is proving to be fairly costly leading to a 
long time before the copy is started.

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